(1) Seed Selection and Disinfection: When selecting ginger seeds, it's crucial to avoid those from areas heavily affected by ginger seedling diseases or fields that have previously been infected with ginger borers. Choose healthy rhizomes that are plump, fresh, with a bright skin surface, firm texture, and no visible signs of disease. For disinfection, soak the seeds in 0.5% lime water for 5–6 hours. Alternatively, mix the seeds with ash made from dry, pure grass ash that has been slightly moistened. This mixture should be applied immediately before sowing. Another effective method is to soak the seeds in fungicides such as carbendazim, Dyson-zinc, or North-agri-green heng for 5–6 hours to prevent fungal infections.
(2) Practice Crop Rotation: Since ginger borers can survive in the soil for over three years, it's recommended to rotate crops for at least three years before planting ginger again. If possible, implement crop rotation with non-solanaceous crops, as the pathogens affecting ginger borers can also infect solanaceous plants like tomatoes and peppers. Rotating crops helps break the pest cycle and reduces the risk of re-infection.
(3) Soil Treatment: Soil treatment is most effective when the crop rotation period has been completed and there has been no recent cultivation of solanaceous crops. Before plowing, spread 5–10 kg of lime per acre across the field and incorporate it into the soil through tilling. Additionally, spray the soil directly with a soil bactericide like "North Nonglvheng" to further suppress pathogens and improve soil health.
(4) Prevent Re-infection: To minimize the risk of re-infection, plant sorghum in high-lying, well-drained areas where ginger is grown. Implement regional crop rotation to avoid localized infestations. During the tillering stage, apply beneficial bacteria such as "Spirit" or "Dyson-zinc" as protective agents. Promptly remove any diseased plants and bury them deep away from the ginger field. Treat the surrounding soil within a 1-meter radius of the infected area with quicklime to prevent the spread of pests and diseases. These combined practices help maintain a healthy growing environment and reduce the likelihood of future outbreaks.
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